G2-1814 Improve exceptions on cache store failures

re-cache/src/main/java/com/g2forge/reassert/cache/store/DirectoryCacheStore.java

@@ -15,8 +15,8 @@
 public class DirectoryCacheStore implements ICacheStore<Path> {
 	@Override
 	public Path load(Path path) {
-		if (!path.isAbsolute()) throw new IllegalArgumentException();
-		if (!Files.isDirectory(path)) throw new IllegalArgumentException();
+		if (!path.isAbsolute()) throw new IllegalArgumentException(path + " is not absolute!");
+		if (!Files.isDirectory(path)) throw new IllegalArgumentException(path + " is not directory!");
 		return path;
 	}
 
@@ -38,7 +38,7 @@ public Path store(Path path, Path value) {
 				}
 			}
 		} catch (IOException exception) {
-			throw new RuntimeIOException(exception);
+			throw new RuntimeIOException("Failed to store " + value + " to " + path, exception);
 		}
 		return path;
 	}

re-cache/src/main/java/com/g2forge/reassert/cache/store/FileCacheStore.java

@@ -20,12 +20,12 @@ public Path load(Path path) {
 
 	@Override
 	public Path store(Path path, Path value) {
-		if (!path.isAbsolute()) throw new IllegalArgumentException();
+		if (!path.isAbsolute()) throw new IllegalArgumentException(String.format("\"%1$s\" is not absolute", path));
 		try {
 			Files.createDirectories(path.getParent());
 			Files.move(value, path, StandardCopyOption.REPLACE_EXISTING);
 		} catch (IOException exception) {
-			throw new RuntimeIOException(exception);
+			throw new RuntimeIOException("Failed to store " + value + " to " + path, exception);
 		}
 		return path;
 	}

re-cache/src/main/java/com/g2forge/reassert/cache/store/JacksonCacheStore.java

@@ -14,8 +14,7 @@
 /**
  * A cache store for objects, which uses a jackson object mapper to serialize and deserialize them.
  * 
- * @param <T>
- *            The type of the values being stored.
+ * @param <T> The type of the values being stored.
  */
 @Getter
 @RequiredArgsConstructor
@@ -28,22 +27,22 @@ public class JacksonCacheStore<T> implements ICacheStore<T> {
 
 	@Override
 	public T load(Path path) {
-		if (!path.isAbsolute()) throw new IllegalArgumentException();
+		if (!path.isAbsolute()) throw new IllegalArgumentException(String.format("\"%1$s\" is not absolute", path));
 		try {
 			return getMapper().readValue(path.toFile(), type.getErasedType());
 		} catch (IOException e) {
-			throw new RuntimeIOException(e);
+			throw new RuntimeIOException("Failed to load " + getType() + " from " + path, e);
 		}
 	}
 
 	@Override
 	public T store(Path path, T value) {
-		if (!path.isAbsolute()) throw new IllegalArgumentException();
+		if (!path.isAbsolute()) throw new IllegalArgumentException(String.format("\"%1$s\" is not absolute", path));
 		try {
 			Files.createDirectories(path.getParent());
 			getMapper().writeValue(path.toFile(), value);
 		} catch (IOException e) {
-			throw new RuntimeIOException(e);
+			throw new RuntimeIOException("Failed to store " + value + " to " + path, e);
 		}
 		return value;
 	}

re-cache/src/main/java/com/g2forge/reassert/cache/store/ObjectSerializationCacheStore.java

@@ -27,27 +27,27 @@ public class ObjectSerializationCacheStore<T> implements ICacheStore<T> {
 
 	@Override
 	public T load(Path path) {
-		if (!path.isAbsolute()) throw new IllegalArgumentException();
+		if (!path.isAbsolute()) throw new IllegalArgumentException(String.format("\"%1$s\" is not absolute", path));
 		try (ObjectInputStream objectInputStream = new ObjectInputStream(Files.newInputStream(path))) {
 			return type.cast(objectInputStream.readObject());
 		} catch (ClassNotFoundException e) {
-			throw new RuntimeException(e);
+			throw new RuntimeException("Failed to load " + getType() + " from " + path, e);
 		} catch (IOException e) {
-			throw new RuntimeIOException(e);
+			throw new RuntimeIOException("Failed to load " + getType() + " from " + path, e);
 		}
 	}
 
 	@Override
 	public T store(Path path, T value) {
-		if (!path.isAbsolute()) throw new IllegalArgumentException();
+		if (!path.isAbsolute()) throw new IllegalArgumentException(String.format("\"%1$s\" is not absolute", path));
 		try {
 			Files.createDirectories(path.getParent());
 			try (ObjectOutputStream objectOutputStream = new ObjectOutputStream(Files.newOutputStream(path))) {
 				objectOutputStream.writeObject(value);
 				objectOutputStream.flush();
 			}
 		} catch (IOException e) {
-			throw new RuntimeIOException(e);
+			throw new RuntimeIOException("Failed to store " + value + " to " + path, e);
 		}
 		return value;
 	}